The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1989
Filed:
Jul. 24, 1987
Charles W Rutledge, Somerset, NJ (US);
American Telephone and Telegraph Company, AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A method and apparatus for encoding a graphics image by treating the image as plurality of cells. Each cell comprises a plurality of pixels. The states of the pixels of a cell are predicted using pixel states of priorly processed adjacent cells. A differential cell containing differential pixel states is created by comparing the predicted pixel states to the corresponding actual pixel states of the cell. The differential cell is compared with a plurality of predefined library differential cells to locate a closest match and a vector code identifying the located closest matching library cell is transmitted to a decoder. The vector code is used at the decoder to reconstruct an approximation of the image cell using a library of differential cells identical to the library of differential cells used to generate the vector code at the encoder. A variation of the invention dynamically adjusts the size of a cell to compensate for excessive prediction error.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile